Systematic power expansions on the lightcone, typically formulated as factorization theorems, are the key theoretical ingredients for achieving precise predictions for particle physics experiments, such as the LHC, B-factories, and gravitational wave detectors. The main goal of this workshop is to unify recent progress by different groups related to understanding subleading power corrections to lightcone expansions, and resolve a number of outstanding technical issues that are currently hindering further advances. The program will be also an opportunity to coordinate these theoretical advances with phenomenological predictions for experiments to ensure maximum impact. The program will consist of five major themes dedicated to various aspects of developing a systematic understanding of power expansions on the lightcone: